Giant Squid Have Donuts For Brains

In addition to having eyeballs the size of dinner plates and suckers that can leave scars, giant squid have some freaky brains. The organ is small and donut-shaped, with a hole in the middle that accommodates the squid's esophagus. However, this means that the squid can't swallow anything too large, as it could cause its throat to bulge against and damage its brain!